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A GML Object Collection is any GML Object with a property element in its content model whose content model is derived by extension from gml:AbstractMemberType.
In addition, the complex type describing the content model of the GML Object Collection may also include a reference to the attribute group gml:AggregationAttributeGroup to provide additional information about the semantics of the object collection.  This information may be used by applications to group GML objects, and optionally to order and index them.
The allowed values for the aggregationType attribute are defined by gml:AggregationType. See 8.4 of ISO/IEC 11404:1996 for the meaning of the values in the enumeration.

Attribute group information


aggregationType [0..1]gml:AggregationType

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